Thanks! Great option to take the Grey Dog.
I've been in touch with Ken and Tara re: Commercial Shuttle....
My "home run" would be to make it to the T/H before sunset [6:23 pm] on Sunday.
I'll sit on it for a while and see if there are other folks planning a March 3, 2019 start.
PS--I'm only seeing 6:10 AM and 11:45 AM buses from Phoenix headed for Sierra Vista.
[Again, I arrive at Sky Harbor, Phoenix at 2:00 PM.]
Uber shows @ $210 fare from the Phoenix airport to Coronado Memorial Overlook--
If I could split that with another hiker or two I'd be golden!